CPC H04W 74/0833 (2013.01) [H04W 74/004 (2013.01); H04W 74/006 (2013.01); H04W 80/02 (2013.01)] | 12 Claims |
1. A method for random access, comprising:
sending, by a network device, first configuration information corresponding to a preamble and second configuration information corresponding to a physical random access channel (PRACH) resource;
receiving, by the network device, MSG1, and determining a format of random access response (RAR) based on at least one of a preamble corresponding to the MSG1, a PRACH resource corresponding to the MSG1, or whether MSG3 is detected within a first time range; and
sending, by the network device, MSG2, based on the format of RAR,
wherein the first configuration information comprises a first set of preambles for a two-step random access procedure and a second set of preambles for a four-step random access procedure,
wherein the receiving, by the network device, the MSG1, and the determining the format of RAR based on the preamble corresponding to the MSG1 comprises:
receiving, by the network device, a first preamble and a second preamble on a same PRACH resource, wherein the first preamble belongs to the first set of preambles for the two-step random access procedure, and the second preamble belongs to the second set of preambles for the four-step random access procedure; and
determining, by the network device, that the first preamble corresponds to a first RAR format, and determining, by the network device, that the second preamble corresponds to a second RAR format, wherein the first RAR format is used for the two-step random access procedure, and the second RAR format is used for the four-step random access procedure.
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